| US Patent: 788,547 
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| Power Hammer | 
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| Patentees: |  
 | Ole P. Miklebost (exact or similar names) - Brown Valley, Traverse County, MN |  | Anton G. Anderson (exact or similar names) - Brown Valley, Traverse County, MN |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Jul. 20, 1904 |  
| Granted: | May 02, 1905 |  USPTO (New site tip)
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                        Joel Havens
 
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